Most Helpful Guy

Well OK you can assume a guy is horny right off the bat. So how to know if he wants to kiss, well he probably just does.

And that will also confirm his feelings, if he isn't attracted to you it'll probably weird him out and you can move on.

As for signs? You means looks, body language yadayadayada? Just don't clutter your head up with that sh*t. There are too many complex variable to ensure you're reading people correctly, so just go with your gut. If it feels right, it's right.